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Erosion Resistance of Infiltration Brazed Tungsten Carbide Clad Conveyance Piping

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Abstract

As an alternative to weld overlay, brazed tungsten carbide cladding can provide increased erosion protection with less weight added. When used correctly, these coatings have been shown to be superior in conveyance and other industrial applications where erosion by solid particles and corrosion are the mechanisms of failure. Erosion resistance of these materials depends not only on the particular material selected but on the method of application, impact angle, velocity and eroding media. This presentation will discuss several standard materials and test conditions performed per the ASTM G76, “Standard Test Method for Conducting Erosion Tests by Solid Particle Impingement Using Gas Jets”. The principal conclusions reaffirm three basic concepts:

  • At 90° impact angles there are really no “outstanding” performers except the super hard materials.
  • As the angle of impact decreases the commonly employed materials begin to segregate into two groups (positive and negative correlation) based on wear mechanism and performance.
  • The rule of mixtures applies to performance in that composite or metal matrix material performance in erosion directly correlates the proportions of reinforcing particle and matrix material.

Written by: D. W. Bucholz Ph.D. Chad Juliot, Industrial Application Engineer, Conforma Clad Inc.

© 2004 Conforma Clad Inc. All rights reserved.



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